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    <title>Synthetic Points</title>
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          <h4 id="title">Synthetic Points</h4>
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          <p id="shortdesc">Synthetic points example.</p>
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          <div id="api-links">Related API documentation: <ul class="inline"><li><a href="../apidoc/ol.Feature.html" title="API documentation for ol.Feature">ol.Feature</a></li>,<li><a href="../apidoc/ol.Map.html" title="API documentation for ol.Map">ol.Map</a></li>,<li><a href="../apidoc/ol.View.html" title="API documentation for ol.View">ol.View</a></li>,<li><a href="../apidoc/ol.geom.LineString.html" title="API documentation for ol.geom.LineString">ol.geom.LineString</a></li>,<li><a href="../apidoc/ol.geom.Point.html" title="API documentation for ol.geom.Point">ol.geom.Point</a></li>,<li><a href="../apidoc/ol.layer.Vector.html" title="API documentation for ol.layer.Vector">ol.layer.Vector</a></li>,<li><a href="../apidoc/ol.source.Vector.html" title="API documentation for ol.source.Vector">ol.source.Vector</a></li>,<li><a href="../apidoc/ol.style.Circle.html" title="API documentation for ol.style.Circle">ol.style.Circle</a></li>,<li><a href="../apidoc/ol.style.Fill.html" title="API documentation for ol.style.Fill">ol.style.Fill</a></li>,<li><a href="../apidoc/ol.style.Stroke.html" title="API documentation for ol.style.Stroke">ol.style.Stroke</a></li>,<li><a href="../apidoc/ol.style.Style.html" title="API documentation for ol.style.Style">ol.style.Style</a></li></ul></div>
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        <form method="POST" id="codepen-form" target="_blank" action="https://codepen.io/pen/define/">
          <textarea class="hidden" name="title">Synthetic Points</textarea>
          <textarea class="hidden" name="description">Synthetic points example.</textarea>
          <textarea class="hidden" name="js">var count &#x3D; 20000;
var features &#x3D; new Array(count);
var e &#x3D; 18000000;
for (var i &#x3D; 0; i &lt; count; ++i) {
  features[i] &#x3D; new ol.Feature({
    &#x27;geometry&#x27;: new ol.geom.Point(
        [2 * e * Math.random() - e, 2 * e * Math.random() - e]),
    &#x27;i&#x27;: i,
    &#x27;size&#x27;: i % 2 ? 10 : 20
  });
}

var styles &#x3D; {
  &#x27;10&#x27;: new ol.style.Style({
    image: new ol.style.Circle({
      radius: 5,
      fill: new ol.style.Fill({color: &#x27;#666666&#x27;}),
      stroke: new ol.style.Stroke({color: &#x27;#bada55&#x27;, width: 1})
    })
  }),
  &#x27;20&#x27;: new ol.style.Style({
    image: new ol.style.Circle({
      radius: 10,
      fill: new ol.style.Fill({color: &#x27;#666666&#x27;}),
      stroke: new ol.style.Stroke({color: &#x27;#bada55&#x27;, width: 1})
    })
  })
};

var vectorSource &#x3D; new ol.source.Vector({
  features: features,
  wrapX: false
});
var vector &#x3D; new ol.layer.Vector({
  source: vectorSource,
  style: function(feature) {
    return styles[feature.get(&#x27;size&#x27;)];
  }
});

var map &#x3D; new ol.Map({
  layers: [vector],
  target: document.getElementById(&#x27;map&#x27;),
  view: new ol.View({
    center: [0, 0],
    zoom: 2
  })
});

var point &#x3D; null;
var line &#x3D; null;
var displaySnap &#x3D; function(coordinate) {
  var closestFeature &#x3D; vectorSource.getClosestFeatureToCoordinate(coordinate);
  if (closestFeature &#x3D;&#x3D;&#x3D; null) {
    point &#x3D; null;
    line &#x3D; null;
  } else {
    var geometry &#x3D; closestFeature.getGeometry();
    var closestPoint &#x3D; geometry.getClosestPoint(coordinate);
    if (point &#x3D;&#x3D;&#x3D; null) {
      point &#x3D; new ol.geom.Point(closestPoint);
    } else {
      point.setCoordinates(closestPoint);
    }
    if (line &#x3D;&#x3D;&#x3D; null) {
      line &#x3D; new ol.geom.LineString([coordinate, closestPoint]);
    } else {
      line.setCoordinates([coordinate, closestPoint]);
    }
  }
  map.render();
};

map.on(&#x27;pointermove&#x27;, function(evt) {
  if (evt.dragging) {
    return;
  }
  var coordinate &#x3D; map.getEventCoordinate(evt.originalEvent);
  displaySnap(coordinate);
});

map.on(&#x27;click&#x27;, function(evt) {
  displaySnap(evt.coordinate);
});

var stroke &#x3D; new ol.style.Stroke({
  color: &#x27;rgba(255,255,0,0.9)&#x27;,
  width: 3
});
var style &#x3D; new ol.style.Style({
  stroke: stroke,
  image: new ol.style.Circle({
    radius: 10,
    stroke: stroke
  })
});

map.on(&#x27;postcompose&#x27;, function(evt) {
  var vectorContext &#x3D; evt.vectorContext;
  vectorContext.setStyle(style);
  if (point !&#x3D;&#x3D; null) {
    vectorContext.drawGeometry(point);
  }
  if (line !&#x3D;&#x3D; null) {
    vectorContext.drawGeometry(line);
  }
});

map.on(&#x27;pointermove&#x27;, function(evt) {
  if (evt.dragging) {
    return;
  }
  var pixel &#x3D; map.getEventPixel(evt.originalEvent);
  var hit &#x3D; map.hasFeatureAtPixel(pixel);
  if (hit) {
    map.getTarget().style.cursor &#x3D; &#x27;pointer&#x27;;
  } else {
    map.getTarget().style.cursor &#x3D; &#x27;&#x27;;
  }
});
</textarea>
          <textarea class="hidden" name="css"></textarea>
          <textarea class="hidden" name="html">&lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
</textarea>
          <input type="hidden" name="resources" value="https://openlayers.org/en/v4.6.5/css/ol.css,https://openlayers.org/en/v4.6.5/build/ol.js">
          <input type="hidden" name="data">
        </form>
        <pre><code id="example-source" class="language-markup">&lt;!DOCTYPE html&gt;
&lt;html&gt;
  &lt;head&gt;
    &lt;title&gt;Synthetic Points&lt;/title&gt;
    &lt;link rel="stylesheet" href="https://openlayers.org/en/v4.6.5/css/ol.css" type="text/css"&gt;
    &lt;!-- The line below is only needed for old environments like Internet Explorer and Android 4.x --&gt;
    &lt;script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"&gt;&lt;/script&gt;
    &lt;script src="https://openlayers.org/en/v4.6.5/build/ol.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
    &lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
    &lt;script&gt;
      var count &#x3D; 20000;
      var features &#x3D; new Array(count);
      var e &#x3D; 18000000;
      for (var i &#x3D; 0; i &lt; count; ++i) {
        features[i] &#x3D; new ol.Feature({
          &#x27;geometry&#x27;: new ol.geom.Point(
              [2 * e * Math.random() - e, 2 * e * Math.random() - e]),
          &#x27;i&#x27;: i,
          &#x27;size&#x27;: i % 2 ? 10 : 20
        });
      }

      var styles &#x3D; {
        &#x27;10&#x27;: new ol.style.Style({
          image: new ol.style.Circle({
            radius: 5,
            fill: new ol.style.Fill({color: &#x27;#666666&#x27;}),
            stroke: new ol.style.Stroke({color: &#x27;#bada55&#x27;, width: 1})
          })
        }),
        &#x27;20&#x27;: new ol.style.Style({
          image: new ol.style.Circle({
            radius: 10,
            fill: new ol.style.Fill({color: &#x27;#666666&#x27;}),
            stroke: new ol.style.Stroke({color: &#x27;#bada55&#x27;, width: 1})
          })
        })
      };

      var vectorSource &#x3D; new ol.source.Vector({
        features: features,
        wrapX: false
      });
      var vector &#x3D; new ol.layer.Vector({
        source: vectorSource,
        style: function(feature) {
          return styles[feature.get(&#x27;size&#x27;)];
        }
      });

      var map &#x3D; new ol.Map({
        layers: [vector],
        target: document.getElementById(&#x27;map&#x27;),
        view: new ol.View({
          center: [0, 0],
          zoom: 2
        })
      });

      var point &#x3D; null;
      var line &#x3D; null;
      var displaySnap &#x3D; function(coordinate) {
        var closestFeature &#x3D; vectorSource.getClosestFeatureToCoordinate(coordinate);
        if (closestFeature &#x3D;&#x3D;&#x3D; null) {
          point &#x3D; null;
          line &#x3D; null;
        } else {
          var geometry &#x3D; closestFeature.getGeometry();
          var closestPoint &#x3D; geometry.getClosestPoint(coordinate);
          if (point &#x3D;&#x3D;&#x3D; null) {
            point &#x3D; new ol.geom.Point(closestPoint);
          } else {
            point.setCoordinates(closestPoint);
          }
          if (line &#x3D;&#x3D;&#x3D; null) {
            line &#x3D; new ol.geom.LineString([coordinate, closestPoint]);
          } else {
            line.setCoordinates([coordinate, closestPoint]);
          }
        }
        map.render();
      };

      map.on(&#x27;pointermove&#x27;, function(evt) {
        if (evt.dragging) {
          return;
        }
        var coordinate &#x3D; map.getEventCoordinate(evt.originalEvent);
        displaySnap(coordinate);
      });

      map.on(&#x27;click&#x27;, function(evt) {
        displaySnap(evt.coordinate);
      });

      var stroke &#x3D; new ol.style.Stroke({
        color: &#x27;rgba(255,255,0,0.9)&#x27;,
        width: 3
      });
      var style &#x3D; new ol.style.Style({
        stroke: stroke,
        image: new ol.style.Circle({
          radius: 10,
          stroke: stroke
        })
      });

      map.on(&#x27;postcompose&#x27;, function(evt) {
        var vectorContext &#x3D; evt.vectorContext;
        vectorContext.setStyle(style);
        if (point !&#x3D;&#x3D; null) {
          vectorContext.drawGeometry(point);
        }
        if (line !&#x3D;&#x3D; null) {
          vectorContext.drawGeometry(line);
        }
      });

      map.on(&#x27;pointermove&#x27;, function(evt) {
        if (evt.dragging) {
          return;
        }
        var pixel &#x3D; map.getEventPixel(evt.originalEvent);
        var hit &#x3D; map.hasFeatureAtPixel(pixel);
        if (hit) {
          map.getTarget().style.cursor &#x3D; &#x27;pointer&#x27;;
        } else {
          map.getTarget().style.cursor &#x3D; &#x27;&#x27;;
        }
      });
    &lt;/script&gt;
  &lt;/body&gt;
&lt;/html&gt;</code></pre>
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    return response.json();
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